Process response overhaul

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

interfaces/southbound/sbi.go

@@ -19,9 +19,9 @@ type SouthboundInterface interface { // nolint
 	// SetNode injects SBI specific model
 	// representation to the transport.
 	// Needed for type assertion.
-	SetNode() func(schema *yang.Entry, root interface{}, path *gpb.Path, val interface{}, opts ...ytypes.SetNodeOpt) error
+	SetNode(schema *yang.Entry, root interface{}, path *gpb.Path, val interface{}, opts ...ytypes.SetNodeOpt) error
 	Schema() *ytypes.Schema
 	ID() uuid.UUID
 	Type() spb.Type
-	Unmarshal() func([]byte, []string, ygot.ValidatedGoStruct, ...ytypes.UnmarshalOpt) error
+	Unmarshal([]byte, []string, ygot.ValidatedGoStruct, ...ytypes.UnmarshalOpt) error
 }